Size 0 Harnesses fit girths approx 28 – 38cm.
Typical breeds that would normally fit in a size 0 harness: Some breeds as puppies and very small toy breeds.
Size 1 Harnesses fit girths approx 38 – 46cm.
Typical breeds that would normally fit in a size 1 harness: Chihuahua, Papillon, small Yorkshire Terriers and some puppies.
Size 2 Harnesses fit girths approx 38 – 56cm.
Typical breeds that would normally fit in a size 2 harness: Basenji, Havanese, Maltese, Miniature Pinscher, Toy Poodle and Cockerpoo.
Size 3 Harnesses fit girths approx 43 – 61cm.
Typical breeds that would normally fit in a size 3 harness: Bedlington Terrier, Bichon, Border Terrier, Cairn, Cavalier King Charles, Dandie Dinmont, Jack Russell, Lhasa Apso, Miniature Poodle, Miniature Schnauzer, Pug, Westie.
Size 4 Harnesses fit girths approx 48 – 66cm.
Typical breeds that would normally fit in a size 4 harness: Airedale, Bearded Collie, Border Collie, Bull Dog, Corgi, and Springer Spaniel.
Size 5 Harnesses fit girths approx 53 – 77cm.
Typical breeds that would normally fit in a size 5 harness: Bassett Hound, Bull Terrier, English Setter, German Short Haired Pointer, Hungarian Vizsla, and Labradoodle.
Size 6 Harnesses fit girths approx 61 – 89cm.
Typical breeds that would normally fit in a size 6 harness: Chow, Dobermann, Flat Coat Retriever, Giant Schnauzer, German Shepherd, Greyhound, Standard Poodle.